<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=<device-width>, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">

    </div>
</body>
<script src="https://unpkg.com/vue@next"></script>
<script>
    const ComponentName = {
        template:`
        <div >局部组件</div>
        `
    }
    const app =Vue.createApp({
        
        components:{
           ComponentName 
        },
        template:`
      <common-demo />
      <component-name/>
        `,
       

    

    })
    app.component('common-demo',{
        template:`
        <input />

        `
    })
    app.component('common-demo',{
        template:`
        <div>你好</div>

        `
    })
    app.component('async-common-demo',Vue.defineAsyncComponent(()=>{
        return new Promise((resolve, reject)=> {
            setTimeout(()=>{
            resolve({
                template:`<div>The is an asyn Component</div>
                `
            })
            },3000);
        })
        }))
    
    const vm = app.mount("#app");
</script>
</html>